PLATE I 



Variations of Acodontaster elongatus gramiliferus, x o-8 



Fig. I. Specimen B, iormn granultferus, St. WS 823. 



Fig. 2. Specimen D, forma granuliferus, St. WS 804. 



Fig. 3. Intergrade, forma ceramoideus, St. WS 83. 



Fig. 4. Specimen G, intergrade, forma ceramoideus, St. WS 799 A. 



Fig. 5. Specimen J, forma ceramoideus, St. WS 652. 



Fig. 6. Specimen K, forma ceramoideus, type, St. WS 246. 



